//
//  AppDelegate.swift
//  sina
//
//  Created by 崔正强 on 17/3/19.
//  Copyright © 2017年 崔正强. All rights reserved.
//

import UIKit

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {

    var window: UIWindow?


    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
        //手动创建window
        print(NSHomeDirectory())
        window = UIWindow(frame: UIScreen.main.bounds)
//        window?.rootViewController = HMUserAccountViewModel.shared.userLogin ? HMWelcomeViewController() : HMMainTabBarController()
        window?.rootViewController = setupRootViewController()
        
        //设置背景色为白色 导航视图控制器在进行页面手势切换时会出现顶部黑条
        window?.backgroundColor = UIColor.white
        window?.makeKeyAndVisible()
        //注册通知来切换根控制器
        NotificationCenter.default.addObserver(self, selector: #selector(switchRootViewController), name: NSNotification.Name(rawValue: SWITCHROOTVIEWCONTROLLERNOTI), object: nil)
        return true
    }
    
    //监听通知切换根控制器
    @objc private func switchRootViewController(noti: Notification) {
        
        //欢迎界面发送的通知
        if let _ = noti.object {
            window?.rootViewController = HMMainTabBarController()
        }else{
            //微博登录界面发送的通知
            window?.rootViewController = HMWelcomeViewController()
        }
}
    
    //通过用户是否登录来设置根控制器
    private func setupRootViewController()-> UIViewController{
        
        return HMUserAccountViewModel.shared.userLogin ? HMWelcomeViewController() : HMMainTabBarController()
    }

    func applicationWillResignActive(_ application: UIApplication) {
        // Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
        // Use this method to pause ongoing tasks, disable timers, and invalidate graphics rendering callbacks. Games should use this method to pause the game.
    }

    func applicationDidEnterBackground(_ application: UIApplication) {
        // Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
        // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
    }

    func applicationWillEnterForeground(_ application: UIApplication) {
        // Called as part of the transition from the background to the active state; here you can undo many of the changes made on entering the background.
    }

    func applicationDidBecomeActive(_ application: UIApplication) {
        // Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
    }

    func applicationWillTerminate(_ application: UIApplication) {
        // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
    }


}

